Oligonucleotide-coupled Beads
Oligonucleotide-coupled Beads - Related Videos
11:09
Multiplex Detection of Bacteria in Complex Clinical and Environmental Samples using Oligonucleotide-coupled Fluorescent Microspheres
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Cited by 5 •
2011
We describe a multiplex method for the detection of microorganisms within a sample using oligonucleotide-coupled fluorescent beads. Amplicon from all organisms within a sample is hybridized to a panel of probe-coupled beads. A Luminex or Bio-Plex instrument is used to query each bead for bead type and hybridization signal.
09:45
Host Cell Protein Analysis using Enrichment Beads Coupled with Limited Digestion
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2024
A protocol is presented for enriching host cell proteins (HCPs) from drug products (DP) and detecting peptides using proteome enrichment beads. The method is demonstrated using an in-house manufactured monoclonal antibody (mAb) drug substance (DS), which is a well-characterized reference material for evaluating and comparing different methods in terms of performance.
14:14
Optimized Fibrin Gel Bead Assay for the Study of Angiogenesis
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Cited by 166 •
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This video demonstrates the protocol of an in vitro angiogenesis assay that recapitulates several stages of angiogenesis. Time-lapse images of sprouting, lumen formation, branching and anastomosis - key features of angiogenesis - are shown.
11:33
Microinjection of mRNA and Morpholino Antisense Oligonucleotides in Zebrafish Embryos.
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Cited by 87 •
2009
Microinjection is a well-established and effective method for introducing foreign substances into fertilized zebrafish embryos. Here, we demonstrate a robust microinjection technique for performing mRNA overexpression, and morpholino oligonucleotide gene knockdown studies in zebrafish.
03:45
A Bead-Based Multiplex Immunoassay to Identify Pathogen-Specific Antibodies in Saliva
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2025
This video demonstrates a bead-based multiplex immunoassay technique to simultaneously detect antibodies for multiple environmental pathogens in human saliva. Fluorescent beads were coupled to antigens from different pathogens, which were captured using antibodies in the human saliva sample. Upon labeling the antibodies using a fluorescent reporter, the beads were analyzed using flow cytometry to assess the presence of different pathogen-specific antibodies in the saliva.
FAQs
The key determinant is sequence complementarity: a bead-bound oligonucleotide retains a target only when the target sequence can hybridize with it under the assay’s controlled conditions. This sequence-level pairing creates selectivity, while the bead provides a recoverable location for captured material. Researchers can therefore enrich specific nucleic-acid signals before measuring them or applying a downstream assay.
Distinct oligonucleotide sequences allow bead populations to be assigned to different targets. In a multiplexed experiment, each population can track a pathogen genome, antimicrobial-resistance marker, or immune-related transcript within the same organized assay. The identity of the bead population links the retained target to its probe sequence, helping separate results from multiple targets rather than treating the sample as one undifferentiated signal.
Capture becomes informative when the bead-associated target is connected to a measurement step. After complementary material is retained, researchers can measure a signal linked to the captured material or use it in a downstream assay. Thus, the beads create an organized intermediate that supports enrichment followed by detection or further analysis, rather than serving only as a separation surface.
A supported workflow can start by selecting probe sequences for the nucleic-acid targets of interest and assigning them to bead populations. The coupled beads are then used with a biological sample so complementary material can hybridize and remain bead-associated. Researchers can retain or enrich the captured targets, measure a resulting signal, or carry the material into a downstream assay.
In infection research, these beads can organize simultaneous testing for pathogen genomes and antimicrobial-resistance markers. That combination may help identify an infectious agent while also characterizing a resistance-associated target, using distinct probe-bearing bead populations. The multiplexed format is especially useful when several nucleic-acid targets must be examined in a complex biological sample.
For immunology studies, bead populations can be assigned to immune-related transcripts alongside infection-associated targets. This arrangement connects evidence about a pathogen or resistance marker with information about the host response, rather than analyzing those dimensions in isolation. Because targets remain organized by bead-associated probe identity, the approach can support structured interpretation of complex biological samples with reduced sample handling.